From the Super Mario Wiki
A Skullyrex

The Skullyrex[1] is an undead skull enemy that first appeared in Donkey Kong Country Returns and its 3DS port. Skullyrexes are basically Skellirexes without any body at all, but are smaller in size. They hop around from left to right, and they can be taken out with any kind of attack. A Skellirex behaves exactly like a Skullyrex when it loses its body.


  1. Knight, Michael. Donkey Kong Country Returns Prima Official Game Guide. Page 27.